Engine: TD: - Knocking sound when I changed the timing belt

Biotoxic · Feb 21st, 2011, 18:04

Hi, just started my engine for the second time and I noticed some knocking sound coming from the engine. I suspect that timing is a bit bad.
When I put on the new belt I aligned TDC(top dead centre) on the camshaft and crankshaft, but when I locked that belt tensioner in place, that TDC mark moved back about 2 cm(or about 2 tooth's back, counter clockwise) , could that be the problem?

Just made a video, listen.

+ YouTube Video

britishmade1975 · Feb 21st, 2011, 18:50

wooo watch out that dont bend a valve if the timing is out noty a expert but that sounds sick

Biotoxic · Feb 22nd, 2011, 13:55

Just adjusted timing by little bit, sounds better now.

+ YouTube Video

Baffler · Feb 22nd, 2011, 14:08

Still not right I'd say, still a bit of knocking going on there.

Do you want me to make a vid of mine running, to compare sound?

Biotoxic · Feb 22nd, 2011, 17:57

Quote:

Originally Posted by Baffler

Still not right I'd say, still a bit of knocking going on there.

Do you want me to make a vid of mine running, to compare sound?

yes please, that would be great, I have forgotten how my diesel sounded.. last time when I started it, it was on January 14th

Baffler · Feb 22nd, 2011, 20:23

There is something very metallic around 7 seconds into your vid.

I made this earlier...

+ YouTube Video

Bear in mind it would be slightly louder with the cover off.

CRH71 · Feb 22nd, 2011, 20:28

Your timing's out, for sure. Don't run the engine any further, and double-check then correct the cam timing.

My friend and I have just made the same mistake after an engine transplant!

v8 rick · Feb 22nd, 2011, 21:56

your valve timing isn`t wrong as if it were the damage would be done by now it sounds very much like your pump timing is just a little too far advanced this will cause the loud metallic knocking sound you here in your vid clip .
always turn an engine over by hand after fitting a timing belt or chain for that matter then if any resistance is felt it can then be investigated , if you just go ahead and turn the engine over on the starter its game over if the timing is out the damage will be done on the first revolution .

over the years ive fitted 100s of timing belts in my job as a diesel tech the other thing i always do is use tippex to highlight the timing marks before removing the old belt so that it aids refitting hth .

rick.

Biotoxic · Feb 23rd, 2011, 02:12

Quote:

Originally Posted by v8 rick

your valve timing isn`t wrong as if it were the damage would be done by now it sounds very much like your pump timing is just a little too far advanced this will cause the loud metallic knocking sound you here in your vid clip .

My pump timing doesn't need to be adjusted, that's what vadis says, but there was 2 markings on the pump but I ignored that. Slowly that sound is disappearing.
At the moment I am a bit worried about alarm.... it doesn't work or my remote just need a new batteries. I have no problems to start my car with key, it just there is no sign that there should be alarm at all.
Car battery was disconnected for more than a month, maybe its something to do with that..
Thanks Baffler for that video.

Anyway, today I will make a list what I did with my car with pictures and description. After that there will be few more how to guides

Biotoxic · Feb 23rd, 2011, 13:05

another thing, when I pump the brake pedal and when I am holding it down it slowly starts to release the tension, I don't see any fluid leaks under the car...
I've changed front brake discs.. nothing else, feels like it has some air in system... I will try to bleed them, hope this works.

Feb 22nd, 2011, 14:08	#4
Baffler Premier Member Last Online: Apr 21st, 2024 15:36 Join Date: Dec 2002 Location: Co. Limerick, Ireland	Still not right I'd say, still a bit of knocking going on there. Do you want me to make a vid of mine running, to compare sound? __________________ Liam... '96 854 TDI SE, '99 V70 2.5D S, '05 C70 2.0T Collection, '05 S80 2.0T SE, '15 V70 D4 SE Lux Nav.

Feb 21st, 2011, 18:50	#2
britishmade1975 Member Last Online: Jan 5th, 2013 19:05 Join Date: Jul 2010 Location: coventry	wooo watch out that dont bend a valve if the timing is out noty a expert but that sounds sick

Feb 22nd, 2011, 20:28	#7
CRH71 Junior Member Last Online: May 31st, 2017 19:45 Join Date: Jan 2011 Location: Kent	Your timing's out, for sure. Don't run the engine any further, and double-check then correct the cam timing. My friend and I have just made the same mistake after an engine transplant!

Feb 22nd, 2011, 21:56	#8
v8 rick Member Last Online: Apr 2nd, 2016 15:20 Join Date: Dec 2010 Location: bolton	your valve timing isn`t wrong as if it were the damage would be done by now it sounds very much like your pump timing is just a little too far advanced this will cause the loud metallic knocking sound you here in your vid clip . always turn an engine over by hand after fitting a timing belt or chain for that matter then if any resistance is felt it can then be investigated , if you just go ahead and turn the engine over on the starter its game over if the timing is out the damage will be done on the first revolution . over the years ive fitted 100s of timing belts in my job as a diesel tech the other thing i always do is use tippex to highlight the timing marks before removing the old belt so that it aids refitting hth . rick.

Feb 23rd, 2011, 13:05	#10
Biotoxic Master Member Last Online: Dec 30th, 2018 08:33 Join Date: Oct 2010 Location: Craigavon area	another thing, when I pump the brake pedal and when I am holding it down it slowly starts to release the tension, I don't see any fluid leaks under the car... I've changed front brake discs.. nothing else, feels like it has some air in system... I will try to bleed them, hope this works.

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